<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>      
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
 <script type="text/javascript">

    //var student={"name":"zs","age":"11","gender":"male"};

    var str="{\"name\":\"zs\",\"age\":\"11\",\"gender\":\"male\"}";

    var s1="1+2";
    console.log(s1);
    //执行字符串,脱掉字符串外面的""
    console.log(eval("("+s1+")"));
    var obj=eval("("+str+")");
    console.log(obj.name);
</script>
</body>
</html>